Vortex 253ZK-37 CAT5 525 Aluminum Rear Sprocket 37-Tooth

The Vortex 253ZK-37 is a CAT5 series aluminum rear sprocket featuring a 525 chain pitch and 37-tooth count. Engineered for performance street and track riders, this sprocket is precision-machined from a specially formulated aluminum alloy to deliver a lightweight, durable upgrade over stock steel sprockets.

Vortex CAT5 sprockets feature a distinctive color anodized finish with contrasting silver machine cuts on the sweeps, mud grooves, and teeth excluded from the anodizing — delivering a bold, race-inspired appearance. The patented Vortex tooth profile, often referred to as "saber tooth," is designed to reduce chain wear and extend sprocket service life beyond conventional designs.

Key Features:

• Chain Pitch: 525
• Tooth Count: 37T
• Material: Lightweight CAT5 aerospace-grade aluminum alloy
• 100% CNC manufactured in the USA
• Silver anodized with color accent options; contrasting silver machine-cut highlights
• Patented saber tooth groove design increases sprocket longevity
• Reduces rotating mass compared to OEM steel sprockets
• Vortex patented sprocket design unlike any other on the market

The Vortex 253ZK-37 is an ideal replacement or performance upgrade for riders looking to fine-tune their final drive gearing. Whether used for street riding or track days, this sprocket delivers the quality and precision that Vortex Racing is known for.